How to refer to root class from a package in Java 1.4

Question

Hi
I have written a class at root level and it is being called be a different class which is defined in a package, when I am trying to import base class it is giving compilation error in Java 1.4.0 and Java 1.4.1 version but code work fine with java 1.2.2
For you reference here is sample code
First class AddNumbers defined at root
public class AddNumbers{
     int iResult=0;
     public AddNumbers(int a, int b){
          iResult= a+b;
     public int getSum(){
          return iResult;
second class PlayNumbers is defined in package TreeTest
package TreeTest;
import AddNumbers;
public class PlayNumbers{
     int iNum1 =5;
     int iNum2 = 10;
     int iRes;
     public PlayNumbers(){
          AddNumbers ad = new AddNumbers(iNum1,iNum2);
          iRes = ad.getSum();
          System.out.println("Result is ="+iRes);
public static void main(String [] arg){
          new PlayNumbers();
Could anyone suggest how to invoke AddNumbers class in JDK1.4.1
Thanks
AKM

Answer 1

The root package should never have been automatically included for compilation purposes.
In order to access a class in the root package import it as you should for any other class.
import AddNumbers;
is the proper way to do this.
The only time you don't need to use an import statement is if the class you wish to reference is in the same package as the class that refers to it. Again, you should really import such classes as it makes things explicitly clear which classes you are referring to.